下面是幾個非常好的介紹搜索引擎的ppt。都是英文內容，但非常不錯，下面一些精華內容我稍做翻譯。
http://www.ukoln.ac.uk/isg/events/library-2000/search/search.ppt
　

    檢索4步曲，此外還介紹了Specialized Search Engines、Tools for seeing the Invisible Web等各種類型的檢索工具。
Focus(目的)—What is your mission or question?
Strategize(決策)—Which search tools will you use? Which keywords and search terms will you use and how will you express them?
Evaluate(評價)—Which results will you visit? Which sites or documents are worthy enough to use? Did I do good work?
Refine(重搜)--How might I improve my search results?

http://www.itrainonline.org/itrainonline/mmtk/mmtk_searching.ppt
檢索策略，不翻譯了，再說也翻譯不好，呵呵。
7 Stage Search Strategy:
1. Unpack your query(分開)
2. Phrase your query(解釋)
3. Categorise your query(分類)
4. Match a tool to your query(選擇引擎)
5. Seek advice from a relevant person(咨詢智者)
6. Try again!(重試)
7. Evaluate your results(評價)
http://computing.wlu.edu/services/training/search%20engines.ppt
提到：If two sites use the same engine, you’ll get the same results。
還提到~apple ~pie同義詞檢索，以前倒沒聽說過，搜索~password，發現ID/LOGIN/KEY也以粗體字出現了，呵呵。也許是個發現呢。
http://www.lib.flinders.edu.au/info/branch/medical/search.ppt
常見檢索引擎的檢索特點和用法。
google還是能用截詞檢索的，即*代替某個字母，中文google也支持的�！�？”也能用。不知以前為何不能用？